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采用数值模拟的方法分析了不同离轴角距离、不同大气湍流强度及激光出光口径下,信标的纯角度非等晕误差对激光发射自适应光学系统(AO)校正效果的影响。同时针对离轴点信标,提出了一种去除整体倾斜的准直方法。数值模拟结果表明,在其他条件不变的情况下,信标离轴角距离越大,口径越大湍流强度越强,点信标离轴引起的纯角度非等晕误差越大,但较(θ/θ0)5/3偏小,与理论分析符合较好。通过数据拟合得出,当出光口径一定时,纯角度非等晕误差仅与θ/θ0有关。给出了纯角度非等晕误差与θ/θ0的定量关系,为快速评价角度非等晕误差提供了模型支持。
The effect of non-isosunarisation error of pure angle of beacon on laser emission adaptive optics (AO) correction was analyzed by numerical simulation with different off-axis angular distances, different atmospheric turbulence intensity and laser exit aperture. At the same time, aiming at the off-axis point beacon, a collimation method to remove the whole tilt is proposed. Numerical simulations show that the larger the off-axis angle of the beacon is and the larger the turbulence intensity is, the larger the non-isochrone error caused by the point beacon off-axis is. However, θ / θ0) 5/3 is small, which is in good agreement with the theoretical analysis. The data fitting shows that when the output aperture is constant, the pure isometric error is only related to θ / θ0. The quantitative relationship between non-isometric halo error and θ / θ0 is given, which provides a model support for the rapid evaluation of non-isodial halo error.